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MAX4559ESE中文资料

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General Description

The MAX4558/MAX4559/MAX4560 are low-voltage,CMOS analog ICs configured as an 8-to-1 multiplexer (MAX4558), a dual 4-to-1 multiplexer (MAX4559), and a triple single-pole/double-throw (SPDT) switch (MAX4560). Each switch is protected against ±15kV electrostatic discharge (ESD) shocks, without latchup or damage.

These CMOS devices can operate continuously from dual supplies of ±2V to ±6V or from a +2V to +12V sin-gle supply. Each switch can handle Rail-to-Rail ?ana-log signals. The off-leakage current is only 1nA at +25°C or 10nA at +85°C max.

All digital inputs have +0.8V to +2.4V logic thresholds,ensuring TTL/CMOS-logic compatibility when using a single +5V supply or dual ±5V supplies.

Applications

Battery-Operated Equipment Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Communications Circuits High-ESD Environments

Features

o ESD-Protected X, Y, Z and X_, Y_, Z_ Pins

±15kV (Human Body Model)

±12kV (IEC 1000-4-2, Air-Gap Discharge)±8kV (IEC 1000-4-2, Contact Discharge) o Pin-Compatible with Industry-Standard 74HC4051/74HC4052/74HC4053o Guaranteed On-Resistance

220?with Single +5V Supply 160?with ±5V Supply o R ON Match Between Channels: 2?(typ)o Guaranteed Low leakage Currents

1nA Off-Leakage (at +25°C)1nA On-Leakage (at +25°C)

o TTL-Compatible Inputs with +5V/±5V Supplies o Low Distortion: < 0.02% (600?)o Low Crosstalk: < -93dB (50?)o High Off-Isolation: < -96dB (50?)

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

________________________________________________________________Maxim Integrated Products

19-1443; Rev 0; 4/99

Ordering Information continued at end of data sheet.

Pin Configurations/Functional Diagrams

Ordering Information

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 2_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies

(V CC = +4.5V to +5.5V, V EE = -4.5V to -5.5V, V _H = +2.4V, V _L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Note 1:Signals on any terminal exceeding V CC or V EE are clamped by internal diodes. Limit forward diode current to maximum cur-rent rating.

(Voltages referenced to V EE )

V CC ........................................................................-0.3V to +13V Voltage into Any Terminal (Note 1)....(V EE - 0.3V) to (V CC + 0.3V)Continuous Current into Any Terminal .............................±10mA Peak Current, X, Y, Z, X_, Y_, Z_

(pulsed at 1ms, 10% duty cycle) ..................................±30mA ESD per Method IEC 1000-4-2 (X, Y, Z, X_, Y_, Z_)

Air-Gap Discharge.........................................................±12kV Contact Discharge............................................................±8kV ESD per Method 3015.7

V CC , V EE , A, B, C, ENABLE, GND................................±2.5kV X, Y, Z, X_, Y_, Z_............................................................±15kV

Continuous Power Dissipation (T A = +70°C)

QSOP (derate 8.00mW/°C above +70°C)....................640mW Narrow SO (derate 8.70mW/°C above +70°C).............696mW DIP (derate 10.53mW/°C above +70°C).......................842mW Operating Temperature Ranges

MAX45_ _C_E......................................................0°C to +70°C MAX45_ _E_E ...................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10sec).............................+300°C

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

_______________________________________________________________________________________3

ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (continued)

(V CC = +4.5V to +5.5V, V EE = -4.5V to -5.5V, V _H = +2.4V, V _L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 4_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (continued)

(V CC = +4.5V to +5.5V, V EE = -4.5V to -5.5V, V _H = +2.4V, V _L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T = +25°C.)

ELECTRICAL CHARACTERISTICS—Single +5V Supply

(V CC = +4.5V to +5.5V, V EE = 0, V _H = +2.4V, V _L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T

= +25°C.)

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

_______________________________________________________________________________________5

ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)

(V CC = +4.5V to +5.5V, V EE = 0, V _H = +2.4V, V _L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 6_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Single +3V Supply

(V CC = +2.7V to +3.6V, V _H = +2.0V, V _L = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)

Note 2:The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.Note 3:?R ON = R ON(MAX)- R ON(MIN).

Note 4:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges; i.e., V ON = 3V to 0 and 0 to -3V.

Note 5:Leakage parameters are 100% tested at the maximum-rated hot operating temperature and are guaranteed by correlation

at T A = +25°C.

Note 6:Guaranteed by design, not production tested.

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

_______________________________________________________________________________________7

040208060100120160140180-5

-3

-2

-1

-4

2345

ON-RESISTANCE vs. V X , V Y , V Z

(DUAL SUPPLIES)

V X , V Y , V Z (V)

R O N (?)

120602401803003604204800

1.0 1.5

2.00.5 2.5

3.0 3.5

4.0 4.5

5.0

ON-RESISTANCE vs. V X , V Y , V Z

(SINGLE SUPPLY)

V X , V Y , V Z (V)

R O N (?)

ON-RESISTANCE vs. V X , V Y , V Z AND TEMPERATURE (DUAL SUPPLIES)

50807010090110

130120140

R O N (?)

-5

-3

-2

-1

-4

V X , V Y , V Z (V)

70605010090801201101301601501401700

1.0 1.5

2.00.5 2.5

3.0 3.5

4.0 4.5

5.0

ON-RESISTANCE vs. V X , V Y , V Z AND TEMPERATURE (SINGLE SUPPLY)

V X , V Y , V Z (V)

R O N (?)

0.0001

-50

-10

-30

100

90POWER-SUPPLY CURRENT vs. TEMPERATURE

0.0010.01

0.1

1TEMPERATURE (°C)

I C C , I E E (n A )

10000.01

-50-20-5-35255570100

85ON/OFF-LEAKAGE CURRENT

vs. TEMPERATURE

0.11

100

TEMPERATURE (°C)

L E A K A G E C U R R E N T (p A )

1040-10

-6-4-8

0-224108612

-5

-3

-2

-1

-4

CHARGE INJECTION vs.

V X , V Y , V Z

V X , V Y , V Z (V)

Q (p C )

40208060120100140180160200-60

-20

-4020

100

SCR HOLDING CURRENT vs. TEMPERATURE

TEMPERATURE (°C)

H O L D I N G

C U R R E N T (m A )

509070*********

170

±2.0±3.0±3.5±2.5±4.0±4.5±5.0±5.5±6.0

TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V CC , V EE )

t O N , t O F F (n s )

Typical Operating Characteristics

(V CC = +5V, V EE = -5V, T A = +25°C, unless otherwise noted.)

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 8_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V CC = +5V, V EE = -5V, T A = +25°C, unless otherwise noted.)

Pin Description

405070608090100

110-40

-20

TURN-ON/TURN-OFF TIME vs. TEMPERATURE

TEMPERATURE (°C)

t O N , t O F F (n s )

1k 100

10k 100k

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

FREQUENCY (Hz)

T H D (%)0.0250.0240.018

0.0190.0220.0210.0200.02310k

100k

10M

100M

FREQUENCY RESPONSE

FREQUENCY (Hz)

R E S P O N S E (d B )

-100

-70-40-20-10-60-90

-50-80-30

_______________Detailed Description

The MAX4558/MAX4559/MAX4560 are ESD protected (per IEC 1000-4-2) at their X, Y, Z output pins and X_,Y_, Z_ input pins. These ICs feature on-chip bidirection-al silicon-controlled rectifiers (SCRs) between the pro-tected pins and GND. The SCRs are normally off and have a negligible effect on the switches’ performance.During an ESD strike, the voltages at the protected pins go Beyond-the-Rails?, causing the corresponding SCR(s) to turn on in a few nanoseconds. This bypasses the surge current safely to ground. This protection method is superior to using diode clamps to the sup-plies. Unless the supplies are very carefully decoupled through low-ESR capacitors, the ESD current through a diode clamp could cause a significant spike in the sup-plies, which might damage or compromise the reliabili-ty of any other chip powered by those same supplies. In addition to the SCRs at the ESD-protected pins,these devices provide internal diodes connected to the supplies. Resistors placed in series with these diodes limit the current flowing into the supplies during an ESD strike. The diodes protect the X, Y, Z and X_, Y_, Z_pins from overvoltages due to improper power-supply sequencing.

Once the SCR turns on because of an ESD strike, it remains on until the current through it falls below its “holding current.” The holding current is typically 110mA in the positive direction (current flowing into the pin) and 95mA in the negative direction at room tem-perature (see SCR Holding Current vs. Temperature in the Typical Operating Characteristics ). The system should be designed so that any sources connected to

the X, Y, Z or X_, Y_, Z_ pins are current limited to a value below the holding current. This ensures that the SCR turns off and normal operation resumes after an ESD event.

Keep in mind that the holding currents vary significantly with temperature; they drop to 70mA (typ) in the posi-tive direction and 65mA (typ) in the negative direction,at +85°C worst case. To guarantee turn-off of the SCRs under all conditions, current limit the sources connect-ed to these pins to not more than half of these typical values. When the SCR is latched, the voltage across it is about ±3V, depending on the polarity of the pin cur-rent. The supply voltages do not affect the holding cur-rents appreciably. When one or more SCRs turn on because of an ESD event, all switches in the part turn off to prevent current through the switch(es) from sus-taining latchup.

Even though most of the ESD current flows to GND through the SCRs, a small portion of it goes into the supplies. Therefore, it is a good idea to bypass the supply pins with 100nF capacitors to the ground plane.

__________Applications Information

ESD Protection

The MAX4558/MAX4559/MAX4560 are characterized for protection to the following:

?±15kV using the Human Body Model

?±8kV using the Contact Discharge method specified

in IEC 1000-4-2 (formerly IEC 801-2)

?±12kV using the Air-Gap Discharge method speci-fied in IEC 1000-4-2 (formerly IEC 801-2).

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

_______________________________________________________________________________________9

Table 1. Truth Table/Switch Programming

Note:Input and output pins are identical and interchangeable. Either may be considered an input or output; signals pass equally well in

either direction.

Beyond-the-Rails is a trademark of Maxim Integrated Products.

M A X 4558/M A X 4559/M A X 4560

ESD Test Conditions

ESD performance depends on several conditions.Contact Maxim for a reliability report that documents test setup, methodology, and results.

Human Body Model

Figure 6 shows the Human Body Model, and Figure 7shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of inter-est, which is then discharged into the test device through a 1.5k ?resistor.

Power-Supply Considerations

The MAX4558/MAX4559/MAX4560 are typical of most CMOS analog switches. They have three supply pins:V CC , V EE , and GND. V CC and V EE drive the internal CMOS switches and set the limits of the analog voltage on every switch. Internal reverse ESD-protection diodes connect between each analog signal pin and both V CC and V EE . If any analog signal exceeds V CC or V EE , one of these diodes conducts. The only currents drawn from V CC or V EE during normal operation are the leak-age currents of these ESD diodes.

Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V CC or V EE and the analog signal. Their leakage currents vary as the signal varies. The difference in the two diode leakages to the V CC and V EE pins constitutes the analog signal-path leakage current. All analog leakage current flows between each input and one of the supply

terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of either the same or opposite polarity.

V CC and GND power the internal logic and logic-level translators, and set the input logic limits. The logic-level translators convert the logic levels into switched V CC and V EE signals to drive the gates of the analog switch.This drive signal is the only connection between the logic supplies and logic signals and the analog sup-plies. V CC and V EE have ESD-protection diodes to GND.

The logic-level thresholds are TTL/CMOS compatible when V CC is +5V. As V CC rises, the threshold increases slightly. When V CC reaches +12V, the threshold is about 3.1V (above the TTL-guaranteed high-level mini-mum of 2.4V, but still compatible with CMOS outputs).

High-Frequency Performance

In 50?systems, signal response is reasonably flat up to 50MHz (see Typical Operating Characteristics ).Above 20MHz, the on response has several minor peaks that are highly layout dependent. The problem is not turning the switch on, but turning it off. The off-state switch acts like a capacitor and passes higher frequen-cies with less attenuation. At 1MHz, off-isolation is about -68dB in 50?systems, becoming worse (approx-imately 20dB per decade) as the frequency increases.Higher circuit impedance also degrades off-isolation.Adjacent channel attenuation is about 3dB above that of a bare IC socket and is entirely due to capacitive coupling.

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 10______________________________________________________________________________________

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

______________________________________________________________________________________11

Test Circuits/Timing Diagrams

Figure 1. Switching Times

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 12______________________________________________________________________________________

Figure 2. Break-Before-Make Interval

Figure 3. Charge Injection

Test Circuits/Timing Diagrams (continued)

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

______________________________________________________________________________________13

Figure 4. Off-Isolation/On-Channel Bandwidth and Crosstalk

Figure 5. Channel Off/On-Capacitance

Test Circuits/Timing Diagrams (continued)

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches 14______________________________________________________________________________________

___________________Chip Information

TRANSISTOR COUNT: 221

Figure 6. Human Body ESD Test Model

Figure 7. Human Body Model Current Waveform

Test Circuits/Timing Diagrams (continued)

Ordering Information (continued)

MAX4558/MAX4559/MAX4560

±15kV ESD-Protected, Low-Voltage, CMOS

Analog Multiplexers/Switches

______________________________________________________________________________________15

Package Information

M A X 4558/M A X 4559/M A X 4560

±15kV ESD-Protected, Low-Voltage, CMOS Analog Multiplexers/Switches Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

16____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600?1999 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.

Package Information (continued)